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The U.S. Bureau of Labor Statistics provides data on the year-to-year percentage changes in the wages and salaries of workers in private industries, including both 'white-collar' and 'blue-collar' occupations. Here we consider selected annual data in the file P02_56.xlsx. Is there evidence of a strong relationship between the yearly changes in the wages and salaries of white-collar and blue-collar workers in the United States over the given time period? Answer this question by estimating and interpreting a simple linear regression model.
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